Methane production from a field-scale biofilter designed for desulfurization of biogas stream

被引:16
|
作者
Pirolli, Mateus [1 ]
Busi da Silva, Marcio Luis [2 ]
Mezzari, Melissa Paola [3 ]
Michelon, William [1 ]
Prandini, Jean Michel [1 ]
Soares, Hugo Moreira [1 ]
机构
[1] Univ Fed Santa Catarina, Dept Chem Engn, BR-88040900 Florianopolis, SC, Brazil
[2] EMBRAPA Swine & Poultry, POB 321, BR-89700000 Concordia, SC, Brazil
[3] West Univ Santa Catarina, Biotechnol & Sci Program, BR-89560000 Videira, SC, Brazil
关键词
Biodesulfurization; Biotrickling filter; Hydrogenotrophic; Methane; RT-PCR; HYDROGEN-SULFIDE REMOVAL; AUTOTROPHIC DENITRIFICATION; ANAEROBIC-DIGESTION; NITROGEN REMOVAL; COMMUNITY; OXIDATION; SUBSTRATE; BACTERIA; PRIMER; H2S;
D O I
10.1016/j.jenvman.2016.04.013
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The development of a simple and low maintenance field-scale biotrickling filter (BTF) for desulfurization of swine wastewater-derived biogas stream that was also capable of increasing biomethane concentrations was investigated. BTF was continuously fed with wastewater effluent from an air sparged nitrification-denitrification bioreactor installed downgradient from an UASB-type digester. BTF maximum removal efficiency (RE) of 99.8% was achieved with a maximum elimination capacity (EC) of 1,509 g H2S m(-3) h(-1). Average EC obtained with inlet biogas flow rates of 0.024, 0.036 and 0.048 m(3) h(-1) was 718, 1,013 and 438 g H2S m(-3) h(-1), respectively. SO4-2 and S-0 were the major metabolites produced from biological conversion of H2S. Additionally to the satisfactory biodesulfurization capacity, an average increase in methane concentration of congruent to 3.8 +/- 1.68 g m(-3) was measured in the filtered gas stream throughout 200 days of BTF operation. RT-PCR analyses of archaea communities in the biofilm confirmed dominance of hydrogenotrophic methanogens thus corroborating with the observed strong correlation between CO2 removal and CH4 production. Among the three major archaea orders investigated (i.e., Methanosarcinales, Methanobacteriales, and Methanomicrobiales), Methanobacteriales were encountered at highest concentrations (1.9 x 10(11) gene copies mL(-1)). The proposed BTF was robust efficiently removing H2S from biogas stream while concomitantly enhancing the concentration of valuable methane as source of renewable fuel. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:161 / 168
页数:8
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